RPC-NC叠合面剪切滑移试验研究

发布时间：2018-06-20 20:18

本文选题：活性粉末混凝土 + 叠合面　；参考：《铁道标准设计》2014年09期

【摘要】：RPC(活性粉末混凝土)作为一种新型超高性能混凝土材料,具有高耐久性、高抗拉压强度及优异的变形能力。但由于其生产工艺相对复杂,制作成本相对较高,预制RPC构件多为实际工程所用。为了克服RPC在实际工程中应用的局限性,各种RPC组合构件应运而生,其中RPC与NC(普通混凝土)叠合构件即为一种有效的应用途径。然而,RPC-NC叠合构件叠合面的力学性能是决定两种材料是否能良好共同工作的关键因素。对36个RPC-NC双面剪切试件进行试验研究,考虑NC强度等级、叠合面正压力等级的影响,对试件破坏形态及剪应力与界面滑移量曲线进行分析。结果表明,无侧向压力试件界面抗剪强度随普通混凝土强度等级升高而增大;有侧向压力试件其抗剪强度随侧压力等级升高而大幅增加,但增加幅度逐渐减缓。
[Abstract]:As a new type of ultra-high performance concrete, RPC (reactive Powder concrete) has high durability, high tensile strength and excellent deformation ability. However, the production process is relatively complex and the production cost is relatively high. Precast RPC components are mostly used in practical projects. In order to overcome the limitations of RPC application in practical engineering, various RPC composite members emerge as the times require, among which RPC and NC (ordinary concrete) superimposed members are an effective way of application. However, the mechanical properties of RPC-NC composite members are the key factors to determine whether the two materials can work well together. In this paper, 36 RPC-NC double-sided shear specimens were tested. Considering the influence of NC strength grade and positive pressure grade on superimposed plane, the failure pattern and shear stress and interface slip curve of the specimens were analyzed. The results show that the interfacial shear strength of non-lateral compression specimens increases with the increase of concrete strength grade, and the shear strength of specimens with lateral pressure increases significantly with the increase of lateral pressure grade, but the increasing range gradually slows down.
【作者单位】：中铁丰桥桥梁有限公司;北京交通大学;
【基金】：铁道部科技研究开发计划项目(2012G006-B)
【分类号】：U444

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